If this occurs, the pump sucks air and fuel pressure and delivery rapidly drops. ![]() While these odd shapes may not cause any issues during regular driving, subjecting the vehicle to high G loads during racing may cause a situation where the fuel moves away from the fuel pump pickup (usually when the fuel level in the tank is less than half). Factory fuel tanks are usually pretty oddly shaped and many feature a saddle design to allow for driveshaft clearance. The fuel tank (or fuel cell) serves the simple function of being the storage tank for the fuel. Starting from the tank that stores the fuel for your vehicle, let’s take a look at every component along the way to the final destination in the cylinders. Even if you are able to maintain safe air-fuel ratios with a deficient fuel system (by reducing boost pressures), you will never realize the maximum power possible with your performance combination. The engine may run lean and burn up your pistons and valves. Too much air and not enough fuel is a recipe for disaster. For peak performance and reliability, fuel flow needs to be optimized as well. However, simply eliminating all of the airflow bottlenecks only completes half the job. ![]() ![]() I n the previous issue of DSPORT, we addressed all of the possible air flow restrictions that could be serving as bottlenecks.
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